That does nothing to detract from the fact that you don't NEED the flash to be off camera for it to be effective.
sent by synchronized cardioversion
I'm not talking about effectiveness. I'm talking about image quality. The flash can fire wherever it is. It can't make modeled images when located at or very near the lens.
you obviously have no clue about bounced flash, and have yet to address this issue.
there were two different types of flash usage being talked about here, one where the flash is near the lens, which you are very wrong about also.
(see: portraits taken with ring flash)
the other, is where the flash is bounced off a wall or ceiling.
both are capable of producing good images.
a speedlight on the camera, bounced off a wall or ceiling is perfectly capable of producing good images.
ive already shown this in my example, and how it makes no difference whether the flash is on or off camera.
for bounced flash, the location of the flash has zero effect on image quality, because the light is diffused by being bounced off a wall or ceiling. the location of the flash is largely irrelevant.